The IMI Non-Return Valve prevents reverse flow, ensuring system integrity in marine applications. Designed for durability, it features an optional spring-loaded hinge for reliable closure. Available with a top-entry access option, it allows inline maintenance without pipe removal, reducing downtime. Constructed from nickel-aluminium bronze (NAB) or stainless steel, it withstands harsh conditions. Suitable for fresh water, grey water, HVAC, lubricating oil, and fuel oil systems, it operates in temperatures from -196°C to 225°C. With sizes up to DN 250, this robust valve provides long-term protection for pipes, pumps, and equipment, ensuring efficient and reliable performance.

Key features

Designed for marine and offshore use

Compatible with water, oil, and fuel systems

One-way flow with non-return sealing

Top-entry design for inline maintenance

Spring-loaded hinge closure option

Available in sizes up to DN 250

Operates from -196°C to 225°C

NAB or stainless steel construction

Designed for marine and offshore use

High-reliability design